Are the three mentioned divorces (deferred, during menstruation under duress, and under duress) considered valid divorces, and what is the way to take back the wife after these divorces?

If a husband stipulates that his wife is divorced if she goes to her sister's house, and she does go, the divorce takes place according to the majority of scholars, and this is the most preponderant opinion. The husband's statement to his wife, "You are divorced," effects a divorce and does not require an intention. Menstruation does not prevent the occurrence of divorce according to the majority of scholars. If a triple divorce occurs, the wife is not lawful for her husband until she marries another man out of genuine desire, and he divorces her after consummation. However, if the third divorce occurs after the waiting period (iddah) has ended without reconciliation, it does not count as a divorce, but rather as a minor irrevocability (baynunah sughra), and it is permissible for the husband to return to her with a new marriage contract. Due to the complexities of the situation, a Sharia judge or scholars should be consulted.